<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/imv_default_avatar.png" alt="用户头像" />
        <span>后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主题区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menulist"
            :key="item.id"
          >
            <!-- 一级菜单的模板区 -->
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.child"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <i class="el-icon-menu"></i>
              <span>{{ subItem.authName }}</span>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧边栏 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>


<script>
export default {
  created() {
    this.getMeunList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  data() {
    return {
      menulist: [],
      iconsObj: {
        1: 'el-icon-s-custom',
        2: 'el-icon-collection-tag',
        3: 'el-icon-s-goods',
        4: 'el-icon-s-order',
        5: 'el-icon-s-data',
      },
      isCollapse: false,
      // 被激活的链接
      activePath: '',
    }
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMeunList() {
      const res = await this.$get('/rule-service/menu', '')
      if (res.code !== 200) return this.$message.error(res.message)
      this.menulist = res.data
    },
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    },
  },
}
</script>


<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;

  div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.toggle-button {
  background-color: #4a5064;
  color: #fff;
  font-size: 10px;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em;
}
</style>
